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This patch adds a PHY Abstraction Layer to the Linux Kernel, enabling

Browse source 
ethernet drivers to remain as ignorant as is reasonable of the connected
PHY's design and operation details.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Andy Fleming 2005-07-30 19:31:23 -04:00 committed by Jeff Garzik
parent b0825488a6
commit 00db8189d9
17 changed files with 4115 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

288
Documentation/networking/phy.txt Normal file
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-------
PHY Abstraction Layer
(Updated 2005-07-21)
Purpose
Most network devices consist of set of registers which provide an interface
to a MAC layer, which communicates with the physical connection through a
PHY. The PHY concerns itself with negotiating link parameters with the link
partner on the other side of the network connection (typically, an ethernet
cable), and provides a register interface to allow drivers to determine what
settings were chosen, and to configure what settings are allowed.
While these devices are distinct from the network devices, and conform to a
standard layout for the registers, it has been common practice to integrate
the PHY management code with the network driver. This has resulted in large
amounts of redundant code. Also, on embedded systems with multiple (and
sometimes quite different) ethernet controllers connected to the same
management bus, it is difficult to ensure safe use of the bus.
Since the PHYs are devices, and the management busses through which they are
accessed are, in fact, busses, the PHY Abstraction Layer treats them as such.
In doing so, it has these goals:
1) Increase code-reuse
2) Increase overall code-maintainability
3) Speed development time for new network drivers, and for new systems
Basically, this layer is meant to provide an interface to PHY devices which
allows network driver writers to write as little code as possible, while
still providing a full feature set.
The MDIO bus
Most network devices are connected to a PHY by means of a management bus.
Different devices use different busses (though some share common interfaces).
In order to take advantage of the PAL, each bus interface needs to be
registered as a distinct device.
1) read and write functions must be implemented. Their prototypes are:
int write(struct mii_bus *bus, int mii_id, int regnum, u16 value);
int read(struct mii_bus *bus, int mii_id, int regnum);
mii_id is the address on the bus for the PHY, and regnum is the register
number. These functions are guaranteed not to be called from interrupt
time, so it is safe for them to block, waiting for an interrupt to signal
the operation is complete
2) A reset function is necessary. This is used to return the bus to an
initialized state.
3) A probe function is needed. This function should set up anything the bus
driver needs, setup the mii_bus structure, and register with the PAL using
mdiobus_register. Similarly, there's a remove function to undo all of
that (use mdiobus_unregister).
4) Like any driver, the device_driver structure must be configured, and init
exit functions are used to register the driver.
5) The bus must also be declared somewhere as a device, and registered.
As an example for how one driver implemented an mdio bus driver, see
drivers/net/gianfar_mii.c and arch/ppc/syslib/mpc85xx_devices.c
Connecting to a PHY
Sometime during startup, the network driver needs to establish a connection
between the PHY device, and the network device. At this time, the PHY's bus
and drivers need to all have been loaded, so it is ready for the connection.
At this point, there are several ways to connect to the PHY:
1) The PAL handles everything, and only calls the network driver when
the link state changes, so it can react.
2) The PAL handles everything except interrupts (usually because the
controller has the interrupt registers).
3) The PAL handles everything, but checks in with the driver every second,
allowing the network driver to react first to any changes before the PAL
does.
4) The PAL serves only as a library of functions, with the network device
manually calling functions to update status, and configure the PHY
Letting the PHY Abstraction Layer do Everything
If you choose option 1 (The hope is that every driver can, but to still be
useful to drivers that can't), connecting to the PHY is simple:
First, you need a function to react to changes in the link state. This
function follows this protocol:
static void adjust_link(struct net_device *dev);
Next, you need to know the device name of the PHY connected to this device.
The name will look something like, "phy0:0", where the first number is the
bus id, and the second is the PHY's address on that bus.
Now, to connect, just call this function:
phydev = phy_connect(dev, phy_name, &adjust_link, flags);
phydev is a pointer to the phy_device structure which represents the PHY. If
phy_connect is successful, it will return the pointer. dev, here, is the
pointer to your net_device. Once done, this function will have started the
PHY's software state machine, and registered for the PHY's interrupt, if it
has one. The phydev structure will be populated with information about the
current state, though the PHY will not yet be truly operational at this
point.
flags is a u32 which can optionally contain phy-specific flags.
This is useful if the system has put hardware restrictions on
the PHY/controller, of which the PHY needs to be aware.
Now just make sure that phydev->supported and phydev->advertising have any
values pruned from them which don't make sense for your controller (a 10/100
controller may be connected to a gigabit capable PHY, so you would need to
mask off SUPPORTED_1000baseT*). See include/linux/ethtool.h for definitions
for these bitfields. Note that you should not SET any bits, or the PHY may
get put into an unsupported state.
Lastly, once the controller is ready to handle network traffic, you call
phy_start(phydev). This tells the PAL that you are ready, and configures the
PHY to connect to the network. If you want to handle your own interrupts,
just set phydev->irq to PHY_IGNORE_INTERRUPT before you call phy_start.
Similarly, if you don't want to use interrupts, set phydev->irq to PHY_POLL.
When you want to disconnect from the network (even if just briefly), you call
phy_stop(phydev).
Keeping Close Tabs on the PAL
It is possible that the PAL's built-in state machine needs a little help to
keep your network device and the PHY properly in sync. If so, you can
register a helper function when connecting to the PHY, which will be called
every second before the state machine reacts to any changes. To do this, you
need to manually call phy_attach() and phy_prepare_link(), and then call
phy_start_machine() with the second argument set to point to your special
handler.
Currently there are no examples of how to use this functionality, and testing
on it has been limited because the author does not have any drivers which use
it (they all use option 1). So Caveat Emptor.
Doing it all yourself
There's a remote chance that the PAL's built-in state machine cannot track
the complex interactions between the PHY and your network device. If this is
so, you can simply call phy_attach(), and not call phy_start_machine or
phy_prepare_link(). This will mean that phydev->state is entirely yours to
handle (phy_start and phy_stop toggle between some of the states, so you
might need to avoid them).
An effort has been made to make sure that useful functionality can be
accessed without the state-machine running, and most of these functions are
descended from functions which did not interact with a complex state-machine.
However, again, no effort has been made so far to test running without the
state machine, so tryer beware.
Here is a brief rundown of the functions:
int phy_read(struct phy_device *phydev, u16 regnum);
int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
Simple read/write primitives. They invoke the bus's read/write function
pointers.
void phy_print_status(struct phy_device *phydev);
A convenience function to print out the PHY status neatly.
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
Clear the PHY's interrupt, and configure which ones are allowed,
respectively. Currently only supports all on, or all off.
int phy_enable_interrupts(struct phy_device *phydev);
int phy_disable_interrupts(struct phy_device *phydev);
Functions which enable/disable PHY interrupts, clearing them
before and after, respectively.
int phy_start_interrupts(struct phy_device *phydev);
int phy_stop_interrupts(struct phy_device *phydev);
Requests the IRQ for the PHY interrupts, then enables them for
start, or disables then frees them for stop.
struct phy_device * phy_attach(struct net_device *dev, const char *phy_id,
u32 flags);
Attaches a network device to a particular PHY, binding the PHY to a generic
driver if none was found during bus initialization. Passes in
any phy-specific flags as needed.
int phy_start_aneg(struct phy_device *phydev);
Using variables inside the phydev structure, either configures advertising
and resets autonegotiation, or disables autonegotiation, and configures
forced settings.
static inline int phy_read_status(struct phy_device *phydev);
Fills the phydev structure with up-to-date information about the current
settings in the PHY.
void phy_sanitize_settings(struct phy_device *phydev)
Resolves differences between currently desired settings, and
supported settings for the given PHY device. Does not make
the changes in the hardware, though.
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
Ethtool convenience functions.
int phy_mii_ioctl(struct phy_device *phydev,
struct mii_ioctl_data *mii_data, int cmd);
The MII ioctl. Note that this function will completely screw up the state
machine if you write registers like BMCR, BMSR, ADVERTISE, etc. Best to
use this only to write registers which are not standard, and don't set off
a renegotiation.
PHY Device Drivers
With the PHY Abstraction Layer, adding support for new PHYs is
quite easy. In some cases, no work is required at all! However,
many PHYs require a little hand-holding to get up-and-running.
Generic PHY driver
If the desired PHY doesn't have any errata, quirks, or special
features you want to support, then it may be best to not add
support, and let the PHY Abstraction Layer's Generic PHY Driver
do all of the work.
Writing a PHY driver
If you do need to write a PHY driver, the first thing to do is
make sure it can be matched with an appropriate PHY device.
This is done during bus initialization by reading the device's
UID (stored in registers 2 and 3), then comparing it to each
driver's phy_id field by ANDing it with each driver's
phy_id_mask field. Also, it needs a name. Here's an example:
static struct phy_driver dm9161_driver = {
.phy_id = 0x0181b880,
.name = "Davicom DM9161E",
.phy_id_mask = 0x0ffffff0,
...
}
Next, you need to specify what features (speed, duplex, autoneg,
etc) your PHY device and driver support. Most PHYs support
PHY_BASIC_FEATURES, but you can look in include/mii.h for other
features.
Each driver consists of a number of function pointers:
config_init: configures PHY into a sane state after a reset.
For instance, a Davicom PHY requires descrambling disabled.
probe: Does any setup needed by the driver
suspend/resume: power management
config_aneg: Changes the speed/duplex/negotiation settings
read_status: Reads the current speed/duplex/negotiation settings
ack_interrupt: Clear a pending interrupt
config_intr: Enable or disable interrupts
remove: Does any driver take-down
Of these, only config_aneg and read_status are required to be
assigned by the driver code. The rest are optional. Also, it is
preferred to use the generic phy driver's versions of these two
functions if at all possible: genphy_read_status and
genphy_config_aneg. If this is not possible, it is likely that
you only need to perform some actions before and after invoking
these functions, and so your functions will wrap the generic
ones.
Feel free to look at the Marvell, Cicada, and Davicom drivers in
drivers/net/phy/ for examples (the lxt and qsemi drivers have
not been tested as of this writing)

2
drivers/net/Kconfig
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@ -131,6 +131,8 @@ config NET_SB1000
source "drivers/net/arcnet/Kconfig"
source "drivers/net/phy/Kconfig"
#
# Ethernet
#

1
drivers/net/Makefile
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@ -65,6 +65,7 @@ obj-$(CONFIG_ADAPTEC_STARFIRE) += starfire.o
#
obj-$(CONFIG_MII) += mii.o
obj-$(CONFIG_PHYLIB) += phy/
obj-$(CONFIG_SUNDANCE) += sundance.o
obj-$(CONFIG_HAMACHI) += hamachi.o

57
drivers/net/phy/Kconfig Normal file
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@ -0,0 +1,57 @@
#
# PHY Layer Configuration
#
menu "PHY device support"
config PHYLIB
bool "PHY Device support and infrastructure"
depends on NET_ETHERNET
help
Ethernet controllers are usually attached to PHY
devices. This option provides infrastructure for
managing PHY devices.
config PHYCONTROL
bool "Support for automatically handling PHY state changes"
depends on PHYLIB
help
Adds code to perform all the work for keeping PHY link
state (speed/duplex/etc) up-to-date. Also handles
interrupts.
comment "MII PHY device drivers"
depends on PHYLIB
config MARVELL_PHY
bool "Drivers for Marvell PHYs"
depends on PHYLIB
---help---
Currently has a driver for the 88E1011S
config DAVICOM_PHY
bool "Drivers for Davicom PHYs"
depends on PHYLIB
---help---
Currently supports dm9161e and dm9131
config QSEMI_PHY
bool "Drivers for Quality Semiconductor PHYs"
depends on PHYLIB
---help---
Currently supports the qs6612
config LXT_PHY
bool "Drivers for the Intel LXT PHYs"
depends on PHYLIB
---help---
Currently supports the lxt970, lxt971
config CICADA_PHY
bool "Drivers for the Cicada PHYs"
depends on PHYLIB
---help---
Currently supports the cis8204
endmenu

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drivers/net/phy/Makefile Normal file
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@ -0,0 +1,9 @@
# Makefile for Linux PHY drivers
obj-$(CONFIG_PHYLIB) += phy.o phy_device.o mdio_bus.o
obj-$(CONFIG_MARVELL_PHY) += marvell.o
obj-$(CONFIG_DAVICOM_PHY) += davicom.o
obj-$(CONFIG_CICADA_PHY) += cicada.o
obj-$(CONFIG_LXT_PHY) += lxt.o
obj-$(CONFIG_QSEMI_PHY) += qsemi.o

134
drivers/net/phy/cicada.c Normal file
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/*
* drivers/net/phy/cicada.c
*
* Driver for Cicada PHYs
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
/* Cicada Extended Control Register 1 */
#define MII_CIS8201_EXT_CON1 0x17
#define MII_CIS8201_EXTCON1_INIT 0x0000
/* Cicada Interrupt Mask Register */
#define MII_CIS8201_IMASK 0x19
#define MII_CIS8201_IMASK_IEN 0x8000
#define MII_CIS8201_IMASK_SPEED 0x4000
#define MII_CIS8201_IMASK_LINK 0x2000
#define MII_CIS8201_IMASK_DUPLEX 0x1000
#define MII_CIS8201_IMASK_MASK 0xf000
/* Cicada Interrupt Status Register */
#define MII_CIS8201_ISTAT 0x1a
#define MII_CIS8201_ISTAT_STATUS 0x8000
#define MII_CIS8201_ISTAT_SPEED 0x4000
#define MII_CIS8201_ISTAT_LINK 0x2000
#define MII_CIS8201_ISTAT_DUPLEX 0x1000
/* Cicada Auxiliary Control/Status Register */
#define MII_CIS8201_AUX_CONSTAT 0x1c
#define MII_CIS8201_AUXCONSTAT_INIT 0x0004
#define MII_CIS8201_AUXCONSTAT_DUPLEX 0x0020
#define MII_CIS8201_AUXCONSTAT_SPEED 0x0018
#define MII_CIS8201_AUXCONSTAT_GBIT 0x0010
#define MII_CIS8201_AUXCONSTAT_100 0x0008
MODULE_DESCRIPTION("Cicadia PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");
static int cis820x_config_init(struct phy_device *phydev)
{
int err;
err = phy_write(phydev, MII_CIS8201_AUX_CONSTAT,
MII_CIS8201_AUXCONSTAT_INIT);
if (err < 0)
return err;
err = phy_write(phydev, MII_CIS8201_EXT_CON1,
MII_CIS8201_EXTCON1_INIT);
return err;
}
static int cis820x_ack_interrupt(struct phy_device *phydev)
{
int err = phy_read(phydev, MII_CIS8201_ISTAT);
return (err < 0) ? err : 0;
}
static int cis820x_config_intr(struct phy_device *phydev)
{
int err;
if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_CIS8201_IMASK,
MII_CIS8201_IMASK_MASK);
else
err = phy_write(phydev, MII_CIS8201_IMASK, 0);
return err;
}
/* Cicada 820x */
static struct phy_driver cis8204_driver = {
.phy_id = 0x000fc440,
.name = "Cicada Cis8204",
.phy_id_mask = 0x000fffc0,
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = &cis820x_config_init,
.config_aneg = &genphy_config_aneg,
.read_status = &genphy_read_status,
.ack_interrupt = &cis820x_ack_interrupt,
.config_intr = &cis820x_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static int __init cis8204_init(void)
{
return phy_driver_register(&cis8204_driver);
}
static void __exit cis8204_exit(void)
{
phy_driver_unregister(&cis8204_driver);
}
module_init(cis8204_init);
module_exit(cis8204_exit);

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drivers/net/phy/davicom.c Normal file
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@ -0,0 +1,195 @@
/*
* drivers/net/phy/davicom.c
*
* Driver for Davicom PHYs
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#define MII_DM9161_SCR 0x10
#define MII_DM9161_SCR_INIT 0x0610
/* DM9161 Interrupt Register */
#define MII_DM9161_INTR 0x15
#define MII_DM9161_INTR_PEND 0x8000
#define MII_DM9161_INTR_DPLX_MASK 0x0800
#define MII_DM9161_INTR_SPD_MASK 0x0400
#define MII_DM9161_INTR_LINK_MASK 0x0200
#define MII_DM9161_INTR_MASK 0x0100
#define MII_DM9161_INTR_DPLX_CHANGE 0x0010
#define MII_DM9161_INTR_SPD_CHANGE 0x0008
#define MII_DM9161_INTR_LINK_CHANGE 0x0004
#define MII_DM9161_INTR_INIT 0x0000
#define MII_DM9161_INTR_STOP \
(MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
| MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
/* DM9161 10BT Configuration/Status */
#define MII_DM9161_10BTCSR 0x12
#define MII_DM9161_10BTCSR_INIT 0x7800
MODULE_DESCRIPTION("Davicom PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");
#define DM9161_DELAY 1
static int dm9161_config_intr(struct phy_device *phydev)
{
int temp;
temp = phy_read(phydev, MII_DM9161_INTR);
if (temp < 0)
return temp;
if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
temp &= ~(MII_DM9161_INTR_STOP);
else
temp |= MII_DM9161_INTR_STOP;
temp = phy_write(phydev, MII_DM9161_INTR, temp);
return temp;
}
static int dm9161_config_aneg(struct phy_device *phydev)
{
int err;
/* Isolate the PHY */
err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
if (err < 0)
return err;
/* Configure the new settings */
err = genphy_config_aneg(phydev);
if (err < 0)
return err;
return 0;
}
static int dm9161_config_init(struct phy_device *phydev)
{
int err;
/* Isolate the PHY */
err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
if (err < 0)
return err;
/* Do not bypass the scrambler/descrambler */
err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
if (err < 0)
return err;
/* Clear 10BTCSR to default */
err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
if (err < 0)
return err;
/* Reconnect the PHY, and enable Autonegotiation */
err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
if (err < 0)
return err;
return 0;
}
static int dm9161_ack_interrupt(struct phy_device *phydev)
{
int err = phy_read(phydev, MII_DM9161_INTR);
return (err < 0) ? err : 0;
}
static struct phy_driver dm9161_driver = {
.phy_id = 0x0181b880,
.name = "Davicom DM9161E",
.phy_id_mask = 0x0ffffff0,
.features = PHY_BASIC_FEATURES,
.config_init = dm9161_config_init,
.config_aneg = dm9161_config_aneg,
.read_status = genphy_read_status,
.driver = { .owner = THIS_MODULE,},
};
static struct phy_driver dm9131_driver = {
.phy_id = 0x00181b80,
.name = "Davicom DM9131",
.phy_id_mask = 0x0ffffff0,
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = dm9161_ack_interrupt,
.config_intr = dm9161_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static int __init davicom_init(void)
{
int ret;
ret = phy_driver_register(&dm9161_driver);
if (ret)
goto err1;
ret = phy_driver_register(&dm9131_driver);
if (ret)
goto err2;
return 0;
err2:
phy_driver_unregister(&dm9161_driver);
err1:
return ret;
}
static void __exit davicom_exit(void)
{
phy_driver_unregister(&dm9161_driver);
phy_driver_unregister(&dm9131_driver);
}
module_init(davicom_init);
module_exit(davicom_exit);

179
drivers/net/phy/lxt.c Normal file
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@ -0,0 +1,179 @@
/*
* drivers/net/phy/lxt.c
*
* Driver for Intel LXT PHYs
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
/* The Level one LXT970 is used by many boards */
#define MII_LXT970_IER 17 /* Interrupt Enable Register */
#define MII_LXT970_IER_IEN 0x0002
#define MII_LXT970_ISR 18 /* Interrupt Status Register */
#define MII_LXT970_CONFIG 19 /* Configuration Register */
/* ------------------------------------------------------------------------- */
/* The Level one LXT971 is used on some of my custom boards */
/* register definitions for the 971 */
#define MII_LXT971_IER 18 /* Interrupt Enable Register */
#define MII_LXT971_IER_IEN 0x00f2
#define MII_LXT971_ISR 19 /* Interrupt Status Register */
MODULE_DESCRIPTION("Intel LXT PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");
static int lxt970_ack_interrupt(struct phy_device *phydev)
{
int err;
err = phy_read(phydev, MII_BMSR);
if (err < 0)
return err;
err = phy_read(phydev, MII_LXT970_ISR);
if (err < 0)
return err;
return 0;
}
static int lxt970_config_intr(struct phy_device *phydev)
{
int err;
if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
else
err = phy_write(phydev, MII_LXT970_IER, 0);
return err;
}
static int lxt970_config_init(struct phy_device *phydev)
{
int err;
err = phy_write(phydev, MII_LXT970_CONFIG, 0);
return err;
}
static int lxt971_ack_interrupt(struct phy_device *phydev)
{
int err = phy_read(phydev, MII_LXT971_ISR);
if (err < 0)
return err;
return 0;
}
static int lxt971_config_intr(struct phy_device *phydev)
{
int err;
if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
else
err = phy_write(phydev, MII_LXT971_IER, 0);
return err;
}
static struct phy_driver lxt970_driver = {
.phy_id = 0x07810000,
.name = "LXT970",
.phy_id_mask = 0x0fffffff,
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = lxt970_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = lxt970_ack_interrupt,
.config_intr = lxt970_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static struct phy_driver lxt971_driver = {
.phy_id = 0x0001378e,
.name = "LXT971",
.phy_id_mask = 0x0fffffff,
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = lxt971_ack_interrupt,
.config_intr = lxt971_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static int __init lxt_init(void)
{
int ret;
ret = phy_driver_register(&lxt970_driver);
if (ret)
goto err1;
ret = phy_driver_register(&lxt971_driver);
if (ret)
goto err2;
return 0;
err2:
phy_driver_unregister(&lxt970_driver);
err1:
return ret;
}
static void __exit lxt_exit(void)
{
phy_driver_unregister(&lxt970_driver);
phy_driver_unregister(&lxt971_driver);
}
module_init(lxt_init);
module_exit(lxt_exit);

140
drivers/net/phy/marvell.c Normal file
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/*
* drivers/net/phy/marvell.c
*
* Driver for Marvell PHYs
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#define MII_M1011_IEVENT 0x13
#define MII_M1011_IEVENT_CLEAR 0x0000
#define MII_M1011_IMASK 0x12
#define MII_M1011_IMASK_INIT 0x6400
#define MII_M1011_IMASK_CLEAR 0x0000
MODULE_DESCRIPTION("Marvell PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");
static int marvell_ack_interrupt(struct phy_device *phydev)
{
int err;
/* Clear the interrupts by reading the reg */
err = phy_read(phydev, MII_M1011_IEVENT);
if (err < 0)
return err;
return 0;
}
static int marvell_config_intr(struct phy_device *phydev)
{
int err;
if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
else
err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
return err;
}
static int marvell_config_aneg(struct phy_device *phydev)
{
int err;
/* The Marvell PHY has an errata which requires
* that certain registers get written in order
* to restart autonegotiation */
err = phy_write(phydev, MII_BMCR, BMCR_RESET);
if (err < 0)
return err;
err = phy_write(phydev, 0x1d, 0x1f);
if (err < 0)
return err;
err = phy_write(phydev, 0x1e, 0x200c);
if (err < 0)
return err;
err = phy_write(phydev, 0x1d, 0x5);
if (err < 0)
return err;
err = phy_write(phydev, 0x1e, 0);
if (err < 0)
return err;
err = phy_write(phydev, 0x1e, 0x100);
if (err < 0)
return err;
err = genphy_config_aneg(phydev);
return err;
}
static struct phy_driver m88e1101_driver = {
.phy_id = 0x01410c00,
.phy_id_mask = 0xffffff00,
.name = "Marvell 88E1101",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_aneg = &marvell_config_aneg,
.read_status = &genphy_read_status,
.ack_interrupt = &marvell_ack_interrupt,
.config_intr = &marvell_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static int __init marvell_init(void)
{
return phy_driver_register(&m88e1101_driver);
}
static void __exit marvell_exit(void)
{
phy_driver_unregister(&m88e1101_driver);
}
module_init(marvell_init);
module_exit(marvell_exit);

173
drivers/net/phy/mdio_bus.c Normal file
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/*
* drivers/net/phy/mdio_bus.c
*
* MDIO Bus interface
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
/* mdiobus_register
*
* description: Called by a bus driver to bring up all the PHYs
* on a given bus, and attach them to the bus
*/
int mdiobus_register(struct mii_bus *bus)
{
int i;
int err = 0;
spin_lock_init(&bus->mdio_lock);
if (NULL == bus || NULL == bus->name ||
NULL == bus->read ||
NULL == bus->write)
return -EINVAL;
if (bus->reset)
bus->reset(bus);
for (i = 0; i < PHY_MAX_ADDR; i++) {
struct phy_device *phydev;
phydev = get_phy_device(bus, i);
if (IS_ERR(phydev))
return PTR_ERR(phydev);
/* There's a PHY at this address
* We need to set:
* 1) IRQ
* 2) bus_id
* 3) parent
* 4) bus
* 5) mii_bus
* And, we need to register it */
if (phydev) {
phydev->irq = bus->irq[i];
phydev->dev.parent = bus->dev;
phydev->dev.bus = &mdio_bus_type;
sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i);
phydev->bus = bus;
err = device_register(&phydev->dev);
if (err)
printk(KERN_ERR "phy %d failed to register\n",
i);
}
bus->phy_map[i] = phydev;
}
pr_info("%s: probed\n", bus->name);
return err;
}
EXPORT_SYMBOL(mdiobus_register);
void mdiobus_unregister(struct mii_bus *bus)
{
int i;
for (i = 0; i < PHY_MAX_ADDR; i++) {
if (bus->phy_map[i]) {
device_unregister(&bus->phy_map[i]->dev);
kfree(bus->phy_map[i]);
}
}
}
EXPORT_SYMBOL(mdiobus_unregister);
/* mdio_bus_match
*
* description: Given a PHY device, and a PHY driver, return 1 if
* the driver supports the device. Otherwise, return 0
*/
static int mdio_bus_match(struct device *dev, struct device_driver *drv)
{
struct phy_device *phydev = to_phy_device(dev);
struct phy_driver *phydrv = to_phy_driver(drv);
return (phydrv->phy_id == (phydev->phy_id & phydrv->phy_id_mask));
}
/* Suspend and resume. Copied from platform_suspend and
* platform_resume
*/
static int mdio_bus_suspend(struct device * dev, u32 state)
{
int ret = 0;
struct device_driver *drv = dev->driver;
if (drv && drv->suspend) {
ret = drv->suspend(dev, state, SUSPEND_DISABLE);
if (ret == 0)
ret = drv->suspend(dev, state, SUSPEND_SAVE_STATE);
if (ret == 0)
ret = drv->suspend(dev, state, SUSPEND_POWER_DOWN);
}
return ret;
}
static int mdio_bus_resume(struct device * dev)
{
int ret = 0;
struct device_driver *drv = dev->driver;
if (drv && drv->resume) {
ret = drv->resume(dev, RESUME_POWER_ON);
if (ret == 0)
ret = drv->resume(dev, RESUME_RESTORE_STATE);
if (ret == 0)
ret = drv->resume(dev, RESUME_ENABLE);
}
return ret;
}
struct bus_type mdio_bus_type = {
.name = "mdio_bus",
.match = mdio_bus_match,
.suspend = mdio_bus_suspend,
.resume = mdio_bus_resume,
};
static int __init mdio_bus_init(void)
{
return bus_register(&mdio_bus_type);
}
subsys_initcall(mdio_bus_init);

862
drivers/net/phy/phy.c Normal file
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/*
* drivers/net/phy/phy.c
*
* Framework for configuring and reading PHY devices
* Based on code in sungem_phy.c and gianfar_phy.c
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
static void phy_change(void *data);
static void phy_timer(unsigned long data);
/* Convenience function to print out the current phy status
*/
void phy_print_status(struct phy_device *phydev)
{
pr_info("%s: Link is %s", phydev->dev.bus_id,
phydev->link ? "Up" : "Down");
if (phydev->link)
printk(" - %d/%s", phydev->speed,
DUPLEX_FULL == phydev->duplex ?
"Full" : "Half");
printk("\n");
}
EXPORT_SYMBOL(phy_print_status);
/* Convenience functions for reading/writing a given PHY
* register. They MUST NOT be called from interrupt context,
* because the bus read/write functions may wait for an interrupt
* to conclude the operation. */
int phy_read(struct phy_device *phydev, u16 regnum)
{
int retval;
struct mii_bus *bus = phydev->bus;
spin_lock_bh(&bus->mdio_lock);
retval = bus->read(bus, phydev->addr, regnum);
spin_unlock_bh(&bus->mdio_lock);
return retval;
}
EXPORT_SYMBOL(phy_read);
int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
{
int err;
struct mii_bus *bus = phydev->bus;
spin_lock_bh(&bus->mdio_lock);
err = bus->write(bus, phydev->addr, regnum, val);
spin_unlock_bh(&bus->mdio_lock);
return err;
}
EXPORT_SYMBOL(phy_write);
int phy_clear_interrupt(struct phy_device *phydev)
{
int err = 0;
if (phydev->drv->ack_interrupt)
err = phydev->drv->ack_interrupt(phydev);
return err;
}
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
{
int err = 0;
phydev->interrupts = interrupts;
if (phydev->drv->config_intr)
err = phydev->drv->config_intr(phydev);
return err;
}
/* phy_aneg_done
*
* description: Reads the status register and returns 0 either if
* auto-negotiation is incomplete, or if there was an error.
* Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
*/
static inline int phy_aneg_done(struct phy_device *phydev)
{
int retval;
retval = phy_read(phydev, MII_BMSR);
return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
}
/* phy_start_aneg
*
* description: Calls the PHY driver's config_aneg, and then
* sets the PHY state to PHY_AN if auto-negotiation is enabled,
* and to PHY_FORCING if auto-negotiation is disabled. Unless
* the PHY is currently HALTED.
*/
int phy_start_aneg(struct phy_device *phydev)
{
int err;
spin_lock(&phydev->lock);
if (AUTONEG_DISABLE == phydev->autoneg)
phy_sanitize_settings(phydev);
err = phydev->drv->config_aneg(phydev);
if (err < 0)
goto out_unlock;
if (phydev->state != PHY_HALTED) {
if (AUTONEG_ENABLE == phydev->autoneg) {
phydev->state = PHY_AN;
phydev->link_timeout = PHY_AN_TIMEOUT;
} else {
phydev->state = PHY_FORCING;
phydev->link_timeout = PHY_FORCE_TIMEOUT;
}
}
out_unlock:
spin_unlock(&phydev->lock);
return err;
}
EXPORT_SYMBOL(phy_start_aneg);
/* A structure for mapping a particular speed and duplex
* combination to a particular SUPPORTED and ADVERTISED value */
struct phy_setting {
int speed;
int duplex;
u32 setting;
};
/* A mapping of all SUPPORTED settings to speed/duplex */
static struct phy_setting settings[] = {
{
.speed = 10000,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_10000baseT_Full,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_1000baseT_Full,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_1000baseT_Half,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_100baseT_Full,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_100baseT_Half,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_10baseT_Full,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_10baseT_Half,
},
};
#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
/* phy_find_setting
*
* description: Searches the settings array for the setting which
* matches the desired speed and duplex, and returns the index
* of that setting. Returns the index of the last setting if
* none of the others match.
*/
static inline int phy_find_setting(int speed, int duplex)
{
int idx = 0;
while (idx < ARRAY_SIZE(settings) &&
(settings[idx].speed != speed ||
settings[idx].duplex != duplex))
idx++;
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}
/* phy_find_valid
* idx: The first index in settings[] to search
* features: A mask of the valid settings
*
* description: Returns the index of the first valid setting less
* than or equal to the one pointed to by idx, as determined by
* the mask in features. Returns the index of the last setting
* if nothing else matches.
*/
static inline int phy_find_valid(int idx, u32 features)
{
while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
idx++;
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}
/* phy_sanitize_settings
*
* description: Make sure the PHY is set to supported speeds and
* duplexes. Drop down by one in this order: 1000/FULL,
* 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
*/
void phy_sanitize_settings(struct phy_device *phydev)
{
u32 features = phydev->supported;
int idx;
/* Sanitize settings based on PHY capabilities */
if ((features & SUPPORTED_Autoneg) == 0)
phydev->autoneg = 0;
idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
features);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
}
EXPORT_SYMBOL(phy_sanitize_settings);
/* phy_force_reduction
*
* description: Reduces the speed/duplex settings by
* one notch. The order is so:
* 1000/FULL, 1000/HALF, 100/FULL, 100/HALF,
* 10/FULL, 10/HALF. The function bottoms out at 10/HALF.
*/
static void phy_force_reduction(struct phy_device *phydev)
{
int idx;
idx = phy_find_setting(phydev->speed, phydev->duplex);
idx++;
idx = phy_find_valid(idx, phydev->supported);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
pr_info("Trying %d/%s\n", phydev->speed,
DUPLEX_FULL == phydev->duplex ?
"FULL" : "HALF");
}
/* phy_ethtool_sset:
* A generic ethtool sset function. Handles all the details
*
* A few notes about parameter checking:
* - We don't set port or transceiver, so we don't care what they
* were set to.
* - phy_start_aneg() will make sure forced settings are sane, and
* choose the next best ones from the ones selected, so we don't
* care if ethtool tries to give us bad values
*/
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
if (cmd->phy_address != phydev->addr)
return -EINVAL;
/* We make sure that we don't pass unsupported
* values in to the PHY */
cmd->advertising &= phydev->supported;
/* Verify the settings we care about. */
if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
return -EINVAL;
if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
return -EINVAL;
if (cmd->autoneg == AUTONEG_DISABLE
&& ((cmd->speed != SPEED_1000
&& cmd->speed != SPEED_100
&& cmd->speed != SPEED_10)
|| (cmd->duplex != DUPLEX_HALF
&& cmd->duplex != DUPLEX_FULL)))
return -EINVAL;
phydev->autoneg = cmd->autoneg;
phydev->speed = cmd->speed;
phydev->advertising = cmd->advertising;
if (AUTONEG_ENABLE == cmd->autoneg)
phydev->advertising |= ADVERTISED_Autoneg;
else
phydev->advertising &= ~ADVERTISED_Autoneg;
phydev->duplex = cmd->duplex;
/* Restart the PHY */
phy_start_aneg(phydev);
return 0;
}
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
cmd->supported = phydev->supported;
cmd->advertising = phydev->advertising;
cmd->speed = phydev->speed;
cmd->duplex = phydev->duplex;
cmd->port = PORT_MII;
cmd->phy_address = phydev->addr;
cmd->transceiver = XCVR_EXTERNAL;
cmd->autoneg = phydev->autoneg;
return 0;
}
/* Note that this function is currently incompatible with the
* PHYCONTROL layer. It changes registers without regard to
* current state. Use at own risk
*/
int phy_mii_ioctl(struct phy_device *phydev,
struct mii_ioctl_data *mii_data, int cmd)
{
u16 val = mii_data->val_in;
switch (cmd) {
case SIOCGMIIPHY:
mii_data->phy_id = phydev->addr;
break;
case SIOCGMIIREG:
mii_data->val_out = phy_read(phydev, mii_data->reg_num);
break;
case SIOCSMIIREG:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (mii_data->phy_id == phydev->addr) {
switch(mii_data->reg_num) {
case MII_BMCR:
if (val & (BMCR_RESET|BMCR_ANENABLE))
phydev->autoneg = AUTONEG_DISABLE;
else
phydev->autoneg = AUTONEG_ENABLE;
if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
break;
case MII_ADVERTISE:
phydev->advertising = val;
break;
default:
/* do nothing */
break;
}
}
phy_write(phydev, mii_data->reg_num, val);
if (mii_data->reg_num == MII_BMCR
&& val & BMCR_RESET
&& phydev->drv->config_init)
phydev->drv->config_init(phydev);
break;
}
return 0;
}
/* phy_start_machine:
*
* description: The PHY infrastructure can run a state machine
* which tracks whether the PHY is starting up, negotiating,
* etc. This function starts the timer which tracks the state
* of the PHY. If you want to be notified when the state
* changes, pass in the callback, otherwise, pass NULL. If you
* want to maintain your own state machine, do not call this
* function. */
void phy_start_machine(struct phy_device *phydev,
void (*handler)(struct net_device *))
{
phydev->adjust_state = handler;
init_timer(&phydev->phy_timer);
phydev->phy_timer.function = &phy_timer;
phydev->phy_timer.data = (unsigned long) phydev;
mod_timer(&phydev->phy_timer, jiffies + HZ);
}
/* phy_stop_machine
*
* description: Stops the state machine timer, sets the state to
* UP (unless it wasn't up yet), and then frees the interrupt,
* if it is in use. This function must be called BEFORE
* phy_detach.
*/
void phy_stop_machine(struct phy_device *phydev)
{
del_timer_sync(&phydev->phy_timer);
spin_lock(&phydev->lock);
if (phydev->state > PHY_UP)
phydev->state = PHY_UP;
spin_unlock(&phydev->lock);
if (phydev->irq != PHY_POLL)
phy_stop_interrupts(phydev);
phydev->adjust_state = NULL;
}
#ifdef CONFIG_PHYCONTROL
/* phy_error:
*
* Moves the PHY to the HALTED state in response to a read
* or write error, and tells the controller the link is down.
* Must not be called from interrupt context, or while the
* phydev->lock is held.
*/
void phy_error(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
phydev->state = PHY_HALTED;
spin_unlock(&phydev->lock);
}
/* phy_interrupt
*
* description: When a PHY interrupt occurs, the handler disables
* interrupts, and schedules a work task to clear the interrupt.
*/
static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs)
{
struct phy_device *phydev = phy_dat;
/* The MDIO bus is not allowed to be written in interrupt
* context, so we need to disable the irq here. A work
* queue will write the PHY to disable and clear the
* interrupt, and then reenable the irq line. */
disable_irq_nosync(irq);
schedule_work(&phydev->phy_queue);
return IRQ_HANDLED;
}
/* Enable the interrupts from the PHY side */
int phy_enable_interrupts(struct phy_device *phydev)
{
int err;
err = phy_clear_interrupt(phydev);
if (err < 0)
return err;
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
return err;
}
EXPORT_SYMBOL(phy_enable_interrupts);
/* Disable the PHY interrupts from the PHY side */
int phy_disable_interrupts(struct phy_device *phydev)
{
int err;
/* Disable PHY interrupts */
err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
if (err)
goto phy_err;
/* Clear the interrupt */
err = phy_clear_interrupt(phydev);
if (err)
goto phy_err;
return 0;
phy_err:
phy_error(phydev);
return err;
}
EXPORT_SYMBOL(phy_disable_interrupts);
/* phy_start_interrupts
*
* description: Request the interrupt for the given PHY. If
* this fails, then we set irq to PHY_POLL.
* Otherwise, we enable the interrupts in the PHY.
* Returns 0 on success.
* This should only be called with a valid IRQ number.
*/
int phy_start_interrupts(struct phy_device *phydev)
{
int err = 0;
INIT_WORK(&phydev->phy_queue, phy_change, phydev);
if (request_irq(phydev->irq, phy_interrupt,
SA_SHIRQ,
"phy_interrupt",
phydev) < 0) {
printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
phydev->bus->name,
phydev->irq);
phydev->irq = PHY_POLL;
return 0;
}
err = phy_enable_interrupts(phydev);
return err;
}
EXPORT_SYMBOL(phy_start_interrupts);
int phy_stop_interrupts(struct phy_device *phydev)
{
int err;
err = phy_disable_interrupts(phydev);
if (err)
phy_error(phydev);
free_irq(phydev->irq, phydev);
return err;
}
EXPORT_SYMBOL(phy_stop_interrupts);
/* Scheduled by the phy_interrupt/timer to handle PHY changes */
static void phy_change(void *data)
{
int err;
struct phy_device *phydev = data;
err = phy_disable_interrupts(phydev);
if (err)
goto phy_err;
spin_lock(&phydev->lock);
if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
phydev->state = PHY_CHANGELINK;
spin_unlock(&phydev->lock);
enable_irq(phydev->irq);
/* Reenable interrupts */
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
if (err)
goto irq_enable_err;
return;
irq_enable_err:
disable_irq(phydev->irq);
phy_err:
phy_error(phydev);
}
/* Bring down the PHY link, and stop checking the status. */
void phy_stop(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
if (PHY_HALTED == phydev->state)
goto out_unlock;
if (phydev->irq != PHY_POLL) {
/* Clear any pending interrupts */
phy_clear_interrupt(phydev);
/* Disable PHY Interrupts */
phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
}
phydev->state = PHY_HALTED;
out_unlock:
spin_unlock(&phydev->lock);
}
/* phy_start
*
* description: Indicates the attached device's readiness to
* handle PHY-related work. Used during startup to start the
* PHY, and after a call to phy_stop() to resume operation.
* Also used to indicate the MDIO bus has cleared an error
* condition.
*/
void phy_start(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
switch (phydev->state) {
case PHY_STARTING:
phydev->state = PHY_PENDING;
break;
case PHY_READY:
phydev->state = PHY_UP;
break;
case PHY_HALTED:
phydev->state = PHY_RESUMING;
default:
break;
}
spin_unlock(&phydev->lock);
}
EXPORT_SYMBOL(phy_stop);
EXPORT_SYMBOL(phy_start);
/* PHY timer which handles the state machine */
static void phy_timer(unsigned long data)
{
struct phy_device *phydev = (struct phy_device *)data;
int needs_aneg = 0;
int err = 0;
spin_lock(&phydev->lock);
if (phydev->adjust_state)
phydev->adjust_state(phydev->attached_dev);
switch(phydev->state) {
case PHY_DOWN:
case PHY_STARTING:
case PHY_READY:
case PHY_PENDING:
break;
case PHY_UP:
needs_aneg = 1;
phydev->link_timeout = PHY_AN_TIMEOUT;
break;
case PHY_AN:
/* Check if negotiation is done. Break
* if there's an error */
err = phy_aneg_done(phydev);
if (err < 0)
break;
/* If auto-negotiation is done, we change to
* either RUNNING, or NOLINK */
if (err > 0) {
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
phydev->state = PHY_NOLINK;
netif_carrier_off(phydev->attached_dev);
}
phydev->adjust_link(phydev->attached_dev);
} else if (0 == phydev->link_timeout--) {
/* The counter expired, so either we
* switch to forced mode, or the
* magic_aneg bit exists, and we try aneg
* again */
if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) {
int idx;
/* We'll start from the
* fastest speed, and work
* our way down */
idx = phy_find_valid(0,
phydev->supported);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
phydev->autoneg = AUTONEG_DISABLE;
phydev->state = PHY_FORCING;
phydev->link_timeout =
PHY_FORCE_TIMEOUT;
pr_info("Trying %d/%s\n",
phydev->speed,
DUPLEX_FULL ==
phydev->duplex ?
"FULL" : "HALF");
}
needs_aneg = 1;
}
break;
case PHY_NOLINK:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
}
break;
case PHY_FORCING:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
if (0 == phydev->link_timeout--) {
phy_force_reduction(phydev);
needs_aneg = 1;
}
}
phydev->adjust_link(phydev->attached_dev);
break;
case PHY_RUNNING:
/* Only register a CHANGE if we are
* polling */
if (PHY_POLL == phydev->irq)
phydev->state = PHY_CHANGELINK;
break;
case PHY_CHANGELINK:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
phydev->state = PHY_NOLINK;
netif_carrier_off(phydev->attached_dev);
}
phydev->adjust_link(phydev->attached_dev);
if (PHY_POLL != phydev->irq)
err = phy_config_interrupt(phydev,
PHY_INTERRUPT_ENABLED);
break;
case PHY_HALTED:
if (phydev->link) {
phydev->link = 0;
netif_carrier_off(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
}
break;
case PHY_RESUMING:
err = phy_clear_interrupt(phydev);
if (err)
break;
err = phy_config_interrupt(phydev,
PHY_INTERRUPT_ENABLED);
if (err)
break;
if (AUTONEG_ENABLE == phydev->autoneg) {
err = phy_aneg_done(phydev);
if (err < 0)
break;
/* err > 0 if AN is done.
* Otherwise, it's 0, and we're
* still waiting for AN */
if (err > 0) {
phydev->state = PHY_RUNNING;
} else {
phydev->state = PHY_AN;
phydev->link_timeout = PHY_AN_TIMEOUT;
}
} else
phydev->state = PHY_RUNNING;
break;
}
spin_unlock(&phydev->lock);
if (needs_aneg)
err = phy_start_aneg(phydev);
if (err < 0)
phy_error(phydev);
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
}
#endif /* CONFIG_PHYCONTROL */

860
drivers/net/phy/phy.c.orig Normal file
View file

@ -0,0 +1,860 @@
/*
* drivers/net/phy/phy.c
*
* Framework for configuring and reading PHY devices
* Based on code in sungem_phy.c and gianfar_phy.c
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
static void phy_change(void *data);
static void phy_timer(unsigned long data);
/* Convenience function to print out the current phy status
*/
void phy_print_status(struct phy_device *phydev)
{
pr_info("%s: Link is %s", phydev->dev.bus_id,
phydev->link ? "Up" : "Down");
if (phydev->link)
printk(" - %d/%s", phydev->speed,
DUPLEX_FULL == phydev->duplex ?
"Full" : "Half");
printk("\n");
}
EXPORT_SYMBOL(phy_print_status);
/* Convenience functions for reading/writing a given PHY
* register. They MUST NOT be called from interrupt context,
* because the bus read/write functions may wait for an interrupt
* to conclude the operation. */
int phy_read(struct phy_device *phydev, u16 regnum)
{
int retval;
struct mii_bus *bus = phydev->bus;
spin_lock_bh(&bus->mdio_lock);
retval = bus->read(bus, phydev->addr, regnum);
spin_unlock_bh(&bus->mdio_lock);
return retval;
}
EXPORT_SYMBOL(phy_read);
int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
{
int err;
struct mii_bus *bus = phydev->bus;
spin_lock_bh(&bus->mdio_lock);
err = bus->write(bus, phydev->addr, regnum, val);
spin_unlock_bh(&bus->mdio_lock);
return err;
}
EXPORT_SYMBOL(phy_write);
int phy_clear_interrupt(struct phy_device *phydev)
{
int err = 0;
if (phydev->drv->ack_interrupt)
err = phydev->drv->ack_interrupt(phydev);
return err;
}
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
{
int err = 0;
phydev->interrupts = interrupts;
if (phydev->drv->config_intr)
err = phydev->drv->config_intr(phydev);
return err;
}
/* phy_aneg_done
*
* description: Reads the status register and returns 0 either if
* auto-negotiation is incomplete, or if there was an error.
* Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
*/
static inline int phy_aneg_done(struct phy_device *phydev)
{
int retval;
retval = phy_read(phydev, MII_BMSR);
return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
}
/* phy_start_aneg
*
* description: Calls the PHY driver's config_aneg, and then
* sets the PHY state to PHY_AN if auto-negotiation is enabled,
* and to PHY_FORCING if auto-negotiation is disabled. Unless
* the PHY is currently HALTED.
*/
int phy_start_aneg(struct phy_device *phydev)
{
int err;
spin_lock(&phydev->lock);
if (AUTONEG_DISABLE == phydev->autoneg)
phy_sanitize_settings(phydev);
err = phydev->drv->config_aneg(phydev);
if (err < 0)
goto out_unlock;
if (phydev->state != PHY_HALTED) {
if (AUTONEG_ENABLE == phydev->autoneg) {
phydev->state = PHY_AN;
phydev->link_timeout = PHY_AN_TIMEOUT;
} else {
phydev->state = PHY_FORCING;
phydev->link_timeout = PHY_FORCE_TIMEOUT;
}
}
out_unlock:
spin_unlock(&phydev->lock);
return err;
}
EXPORT_SYMBOL(phy_start_aneg);
/* A structure for mapping a particular speed and duplex
* combination to a particular SUPPORTED and ADVERTISED value */
struct phy_setting {
int speed;
int duplex;
u32 setting;
};
/* A mapping of all SUPPORTED settings to speed/duplex */
static struct phy_setting settings[] = {
{
.speed = 10000,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_10000baseT_Full,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_1000baseT_Full,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_1000baseT_Half,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_100baseT_Full,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_100baseT_Half,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_FULL,
.setting = SUPPORTED_10baseT_Full,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_HALF,
.setting = SUPPORTED_10baseT_Half,
},
};
#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
/* phy_find_setting
*
* description: Searches the settings array for the setting which
* matches the desired speed and duplex, and returns the index
* of that setting. Returns the index of the last setting if
* none of the others match.
*/
static inline int phy_find_setting(int speed, int duplex)
{
int idx = 0;
while (idx < ARRAY_SIZE(settings) &&
(settings[idx].speed != speed ||
settings[idx].duplex != duplex))
idx++;
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}
/* phy_find_valid
* idx: The first index in settings[] to search
* features: A mask of the valid settings
*
* description: Returns the index of the first valid setting less
* than or equal to the one pointed to by idx, as determined by
* the mask in features. Returns the index of the last setting
* if nothing else matches.
*/
static inline int phy_find_valid(int idx, u32 features)
{
while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
idx++;
return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}
/* phy_sanitize_settings
*
* description: Make sure the PHY is set to supported speeds and
* duplexes. Drop down by one in this order: 1000/FULL,
* 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
*/
void phy_sanitize_settings(struct phy_device *phydev)
{
u32 features = phydev->supported;
int idx;
/* Sanitize settings based on PHY capabilities */
if ((features & SUPPORTED_Autoneg) == 0)
phydev->autoneg = 0;
idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
features);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
}
EXPORT_SYMBOL(phy_sanitize_settings);
/* phy_force_reduction
*
* description: Reduces the speed/duplex settings by
* one notch. The order is so:
* 1000/FULL, 1000/HALF, 100/FULL, 100/HALF,
* 10/FULL, 10/HALF. The function bottoms out at 10/HALF.
*/
static void phy_force_reduction(struct phy_device *phydev)
{
int idx;
idx = phy_find_setting(phydev->speed, phydev->duplex);
idx++;
idx = phy_find_valid(idx, phydev->supported);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
pr_info("Trying %d/%s\n", phydev->speed,
DUPLEX_FULL == phydev->duplex ?
"FULL" : "HALF");
}
/* phy_ethtool_sset:
* A generic ethtool sset function. Handles all the details
*
* A few notes about parameter checking:
* - We don't set port or transceiver, so we don't care what they
* were set to.
* - phy_start_aneg() will make sure forced settings are sane, and
* choose the next best ones from the ones selected, so we don't
* care if ethtool tries to give us bad values
*/
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
if (cmd->phy_address != phydev->addr)
return -EINVAL;
/* We make sure that we don't pass unsupported
* values in to the PHY */
cmd->advertising &= phydev->supported;
/* Verify the settings we care about. */
if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
return -EINVAL;
if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
return -EINVAL;
if (cmd->autoneg == AUTONEG_DISABLE
&& ((cmd->speed != SPEED_1000
&& cmd->speed != SPEED_100
&& cmd->speed != SPEED_10)
|| (cmd->duplex != DUPLEX_HALF
&& cmd->duplex != DUPLEX_FULL)))
return -EINVAL;
phydev->autoneg = cmd->autoneg;
phydev->speed = cmd->speed;
phydev->advertising = cmd->advertising;
if (AUTONEG_ENABLE == cmd->autoneg)
phydev->advertising |= ADVERTISED_Autoneg;
else
phydev->advertising &= ~ADVERTISED_Autoneg;
phydev->duplex = cmd->duplex;
/* Restart the PHY */
phy_start_aneg(phydev);
return 0;
}
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
cmd->supported = phydev->supported;
cmd->advertising = phydev->advertising;
cmd->speed = phydev->speed;
cmd->duplex = phydev->duplex;
cmd->port = PORT_MII;
cmd->phy_address = phydev->addr;
cmd->transceiver = XCVR_EXTERNAL;
cmd->autoneg = phydev->autoneg;
return 0;
}
/* Note that this function is currently incompatible with the
* PHYCONTROL layer. It changes registers without regard to
* current state. Use at own risk
*/
int phy_mii_ioctl(struct phy_device *phydev,
struct mii_ioctl_data *mii_data, int cmd)
{
u16 val = mii_data->val_in;
switch (cmd) {
case SIOCGMIIPHY:
mii_data->phy_id = phydev->addr;
break;
case SIOCGMIIREG:
mii_data->val_out = phy_read(phydev, mii_data->reg_num);
break;
case SIOCSMIIREG:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (mii_data->phy_id == phydev->addr) {
switch(mii_data->reg_num) {
case MII_BMCR:
if (val & (BMCR_RESET|BMCR_ANENABLE))
phydev->autoneg = AUTONEG_DISABLE;
else
phydev->autoneg = AUTONEG_ENABLE;
if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
break;
case MII_ADVERTISE:
phydev->advertising = val;
break;
default:
/* do nothing */
break;
}
}
phy_write(phydev, mii_data->reg_num, val);
if (mii_data->reg_num == MII_BMCR
&& val & BMCR_RESET
&& phydev->drv->config_init)
phydev->drv->config_init(phydev);
break;
}
return 0;
}
/* phy_start_machine:
*
* description: The PHY infrastructure can run a state machine
* which tracks whether the PHY is starting up, negotiating,
* etc. This function starts the timer which tracks the state
* of the PHY. If you want to be notified when the state
* changes, pass in the callback, otherwise, pass NULL. If you
* want to maintain your own state machine, do not call this
* function. */
void phy_start_machine(struct phy_device *phydev,
void (*handler)(struct net_device *))
{
phydev->adjust_state = handler;
init_timer(&phydev->phy_timer);
phydev->phy_timer.function = &phy_timer;
phydev->phy_timer.data = (unsigned long) phydev;
mod_timer(&phydev->phy_timer, jiffies + HZ);
}
/* phy_stop_machine
*
* description: Stops the state machine timer, sets the state to
* UP (unless it wasn't up yet), and then frees the interrupt,
* if it is in use. This function must be called BEFORE
* phy_detach.
*/
void phy_stop_machine(struct phy_device *phydev)
{
del_timer_sync(&phydev->phy_timer);
spin_lock(&phydev->lock);
if (phydev->state > PHY_UP)
phydev->state = PHY_UP;
spin_unlock(&phydev->lock);
if (phydev->irq != PHY_POLL)
phy_stop_interrupts(phydev);
phydev->adjust_state = NULL;
}
#ifdef CONFIG_PHYCONTROL
/* phy_error:
*
* Moves the PHY to the HALTED state in response to a read
* or write error, and tells the controller the link is down.
* Must not be called from interrupt context, or while the
* phydev->lock is held.
*/
void phy_error(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
phydev->state = PHY_HALTED;
spin_unlock(&phydev->lock);
}
/* phy_interrupt
*
* description: When a PHY interrupt occurs, the handler disables
* interrupts, and schedules a work task to clear the interrupt.
*/
static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs)
{
struct phy_device *phydev = phy_dat;
/* The MDIO bus is not allowed to be written in interrupt
* context, so we need to disable the irq here. A work
* queue will write the PHY to disable and clear the
* interrupt, and then reenable the irq line. */
disable_irq_nosync(irq);
schedule_work(&phydev->phy_queue);
return IRQ_HANDLED;
}
/* Enable the interrupts from the PHY side */
int phy_enable_interrupts(struct phy_device *phydev)
{
int err;
err = phy_clear_interrupt(phydev);
if (err < 0)
return err;
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
return err;
}
/* Disable the PHY interrupts from the PHY side */
int phy_disable_interrupts(struct phy_device *phydev)
{
int err;
/* Disable PHY interrupts */
err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
if (err)
goto phy_err;
/* Clear the interrupt */
err = phy_clear_interrupt(phydev);
if (err)
goto phy_err;
return 0;
phy_err:
phy_error(phydev);
return err;
}
/* phy_start_interrupts
*
* description: Request the interrupt for the given PHY. If
* this fails, then we set irq to PHY_POLL.
* Otherwise, we enable the interrupts in the PHY.
* Returns 0 on success.
* This should only be called with a valid IRQ number.
*/
int phy_start_interrupts(struct phy_device *phydev)
{
int err = 0;
INIT_WORK(&phydev->phy_queue, phy_change, phydev);
if (request_irq(phydev->irq, phy_interrupt,
SA_SHIRQ,
"phy_interrupt",
phydev) < 0) {
printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
phydev->bus->name,
phydev->irq);
phydev->irq = PHY_POLL;
return 0;
}
err = phy_enable_interrupts(phydev);
return err;
}
EXPORT_SYMBOL(phy_start_interrupts);
int phy_stop_interrupts(struct phy_device *phydev)
{
int err;
err = phy_disable_interrupts(phydev);
if (err)
phy_error(phydev);
free_irq(phydev->irq, phydev);
return err;
}
EXPORT_SYMBOL(phy_stop_interrupts);
/* Scheduled by the phy_interrupt/timer to handle PHY changes */
static void phy_change(void *data)
{
int err;
struct phy_device *phydev = data;
err = phy_disable_interrupts(phydev);
if (err)
goto phy_err;
spin_lock(&phydev->lock);
if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
phydev->state = PHY_CHANGELINK;
spin_unlock(&phydev->lock);
enable_irq(phydev->irq);
/* Reenable interrupts */
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
if (err)
goto irq_enable_err;
return;
irq_enable_err:
disable_irq(phydev->irq);
phy_err:
phy_error(phydev);
}
/* Bring down the PHY link, and stop checking the status. */
void phy_stop(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
if (PHY_HALTED == phydev->state)
goto out_unlock;
if (phydev->irq != PHY_POLL) {
/* Clear any pending interrupts */
phy_clear_interrupt(phydev);
/* Disable PHY Interrupts */
phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
}
phydev->state = PHY_HALTED;
out_unlock:
spin_unlock(&phydev->lock);
}
/* phy_start
*
* description: Indicates the attached device's readiness to
* handle PHY-related work. Used during startup to start the
* PHY, and after a call to phy_stop() to resume operation.
* Also used to indicate the MDIO bus has cleared an error
* condition.
*/
void phy_start(struct phy_device *phydev)
{
spin_lock(&phydev->lock);
switch (phydev->state) {
case PHY_STARTING:
phydev->state = PHY_PENDING;
break;
case PHY_READY:
phydev->state = PHY_UP;
break;
case PHY_HALTED:
phydev->state = PHY_RESUMING;
default:
break;
}
spin_unlock(&phydev->lock);
}
EXPORT_SYMBOL(phy_stop);
EXPORT_SYMBOL(phy_start);
/* PHY timer which handles the state machine */
static void phy_timer(unsigned long data)
{
struct phy_device *phydev = (struct phy_device *)data;
int needs_aneg = 0;
int err = 0;
spin_lock(&phydev->lock);
if (phydev->adjust_state)
phydev->adjust_state(phydev->attached_dev);
switch(phydev->state) {
case PHY_DOWN:
case PHY_STARTING:
case PHY_READY:
case PHY_PENDING:
break;
case PHY_UP:
needs_aneg = 1;
phydev->link_timeout = PHY_AN_TIMEOUT;
break;
case PHY_AN:
/* Check if negotiation is done. Break
* if there's an error */
err = phy_aneg_done(phydev);
if (err < 0)
break;
/* If auto-negotiation is done, we change to
* either RUNNING, or NOLINK */
if (err > 0) {
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
phydev->state = PHY_NOLINK;
netif_carrier_off(phydev->attached_dev);
}
phydev->adjust_link(phydev->attached_dev);
} else if (0 == phydev->link_timeout--) {
/* The counter expired, so either we
* switch to forced mode, or the
* magic_aneg bit exists, and we try aneg
* again */
if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) {
int idx;
/* We'll start from the
* fastest speed, and work
* our way down */
idx = phy_find_valid(0,
phydev->supported);
phydev->speed = settings[idx].speed;
phydev->duplex = settings[idx].duplex;
phydev->autoneg = AUTONEG_DISABLE;
phydev->state = PHY_FORCING;
phydev->link_timeout =
PHY_FORCE_TIMEOUT;
pr_info("Trying %d/%s\n",
phydev->speed,
DUPLEX_FULL ==
phydev->duplex ?
"FULL" : "HALF");
}
needs_aneg = 1;
}
break;
case PHY_NOLINK:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
}
break;
case PHY_FORCING:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
if (0 == phydev->link_timeout--) {
phy_force_reduction(phydev);
needs_aneg = 1;
}
}
phydev->adjust_link(phydev->attached_dev);
break;
case PHY_RUNNING:
/* Only register a CHANGE if we are
* polling */
if (PHY_POLL == phydev->irq)
phydev->state = PHY_CHANGELINK;
break;
case PHY_CHANGELINK:
err = phy_read_status(phydev);
if (err)
break;
if (phydev->link) {
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
} else {
phydev->state = PHY_NOLINK;
netif_carrier_off(phydev->attached_dev);
}
phydev->adjust_link(phydev->attached_dev);
if (PHY_POLL != phydev->irq)
err = phy_config_interrupt(phydev,
PHY_INTERRUPT_ENABLED);
break;
case PHY_HALTED:
if (phydev->link) {
phydev->link = 0;
netif_carrier_off(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
}
break;
case PHY_RESUMING:
err = phy_clear_interrupt(phydev);
if (err)
break;
err = phy_config_interrupt(phydev,
PHY_INTERRUPT_ENABLED);
if (err)
break;
if (AUTONEG_ENABLE == phydev->autoneg) {
err = phy_aneg_done(phydev);
if (err < 0)
break;
/* err > 0 if AN is done.
* Otherwise, it's 0, and we're
* still waiting for AN */
if (err > 0) {
phydev->state = PHY_RUNNING;
} else {
phydev->state = PHY_AN;
phydev->link_timeout = PHY_AN_TIMEOUT;
}
} else
phydev->state = PHY_RUNNING;
break;
}
spin_unlock(&phydev->lock);
if (needs_aneg)
err = phy_start_aneg(phydev);
if (err < 0)
phy_error(phydev);
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
}
#endif /* CONFIG_PHYCONTROL */

682
drivers/net/phy/phy_device.c Normal file
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@ -0,0 +1,682 @@
/*
* drivers/net/phy/phy_device.c
*
* Framework for finding and configuring PHYs.
* Also contains generic PHY driver
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
/* get_phy_device
*
* description: Reads the ID registers of the PHY at addr on the
* bus, then allocates and returns the phy_device to
* represent it.
*/
struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
{
int phy_reg;
u32 phy_id;
struct phy_device *dev = NULL;
/* Grab the bits from PHYIR1, and put them
* in the upper half */
phy_reg = bus->read(bus, addr, MII_PHYSID1);
if (phy_reg < 0)
return ERR_PTR(phy_reg);
phy_id = (phy_reg & 0xffff) << 16;
/* Grab the bits from PHYIR2, and put them in the lower half */
phy_reg = bus->read(bus, addr, MII_PHYSID2);
if (phy_reg < 0)
return ERR_PTR(phy_reg);
phy_id |= (phy_reg & 0xffff);
/* If the phy_id is all Fs, there is no device there */
if (0xffffffff == phy_id)
return NULL;
/* Otherwise, we allocate the device, and initialize the
* default values */
dev = kcalloc(1, sizeof(*dev), GFP_KERNEL);
if (NULL == dev)
return ERR_PTR(-ENOMEM);
dev->speed = 0;
dev->duplex = -1;
dev->pause = dev->asym_pause = 0;
dev->link = 1;
dev->autoneg = AUTONEG_ENABLE;
dev->addr = addr;
dev->phy_id = phy_id;
dev->bus = bus;
dev->state = PHY_DOWN;
spin_lock_init(&dev->lock);
return dev;
}
/* phy_prepare_link:
*
* description: Tells the PHY infrastructure to handle the
* gory details on monitoring link status (whether through
* polling or an interrupt), and to call back to the
* connected device driver when the link status changes.
* If you want to monitor your own link state, don't call
* this function */
void phy_prepare_link(struct phy_device *phydev,
void (*handler)(struct net_device *))
{
phydev->adjust_link = handler;
}
#ifdef CONFIG_PHYCONTROL
/* phy_connect:
*
* description: Convenience function for connecting ethernet
* devices to PHY devices. The default behavior is for
* the PHY infrastructure to handle everything, and only notify
* the connected driver when the link status changes. If you
* don't want, or can't use the provided functionality, you may
* choose to call only the subset of functions which provide
* the desired functionality.
*/
struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
void (*handler)(struct net_device *), u32 flags)
{
struct phy_device *phydev;
phydev = phy_attach(dev, phy_id, flags);
if (IS_ERR(phydev))
return phydev;
phy_prepare_link(phydev, handler);
phy_start_machine(phydev, NULL);
if (phydev->irq > 0)
phy_start_interrupts(phydev);
return phydev;
}
EXPORT_SYMBOL(phy_connect);
void phy_disconnect(struct phy_device *phydev)
{
if (phydev->irq > 0)
phy_stop_interrupts(phydev);
phy_stop_machine(phydev);
phydev->adjust_link = NULL;
phy_detach(phydev);
}
EXPORT_SYMBOL(phy_disconnect);
#endif /* CONFIG_PHYCONTROL */
/* phy_attach:
*
* description: Called by drivers to attach to a particular PHY
* device. The phy_device is found, and properly hooked up
* to the phy_driver. If no driver is attached, then the
* genphy_driver is used. The phy_device is given a ptr to
* the attaching device, and given a callback for link status
* change. The phy_device is returned to the attaching
* driver.
*/
static int phy_compare_id(struct device *dev, void *data)
{
return strcmp((char *)data, dev->bus_id) ? 0 : 1;
}
struct phy_device *phy_attach(struct net_device *dev,
const char *phy_id, u32 flags)
{
struct bus_type *bus = &mdio_bus_type;
struct phy_device *phydev;
struct device *d;
/* Search the list of PHY devices on the mdio bus for the
* PHY with the requested name */
d = bus_find_device(bus, NULL, (void *)phy_id, phy_compare_id);
if (d) {
phydev = to_phy_device(d);
} else {
printk(KERN_ERR "%s not found\n", phy_id);
return ERR_PTR(-ENODEV);
}
/* Assume that if there is no driver, that it doesn't
* exist, and we should use the genphy driver. */
if (NULL == d->driver) {
int err;
down_write(&d->bus->subsys.rwsem);
d->driver = &genphy_driver.driver;
err = d->driver->probe(d);
if (err < 0)
return ERR_PTR(err);
device_bind_driver(d);
up_write(&d->bus->subsys.rwsem);
}
if (phydev->attached_dev) {
printk(KERN_ERR "%s: %s already attached\n",
dev->name, phy_id);
return ERR_PTR(-EBUSY);
}
phydev->attached_dev = dev;
phydev->dev_flags = flags;
return phydev;
}
EXPORT_SYMBOL(phy_attach);
void phy_detach(struct phy_device *phydev)
{
phydev->attached_dev = NULL;
/* If the device had no specific driver before (i.e. - it
* was using the generic driver), we unbind the device
* from the generic driver so that there's a chance a
* real driver could be loaded */
if (phydev->dev.driver == &genphy_driver.driver) {
down_write(&phydev->dev.bus->subsys.rwsem);
device_release_driver(&phydev->dev);
up_write(&phydev->dev.bus->subsys.rwsem);
}
}
EXPORT_SYMBOL(phy_detach);
/* Generic PHY support and helper functions */
/* genphy_config_advert
*
* description: Writes MII_ADVERTISE with the appropriate values,
* after sanitizing the values to make sure we only advertise
* what is supported
*/
int genphy_config_advert(struct phy_device *phydev)
{
u32 advertise;
int adv;
int err;
/* Only allow advertising what
* this PHY supports */
phydev->advertising &= phydev->supported;
advertise = phydev->advertising;
/* Setup standard advertisement */
adv = phy_read(phydev, MII_ADVERTISE);
if (adv < 0)
return adv;
adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
ADVERTISE_PAUSE_ASYM);
if (advertise & ADVERTISED_10baseT_Half)
adv |= ADVERTISE_10HALF;
if (advertise & ADVERTISED_10baseT_Full)
adv |= ADVERTISE_10FULL;
if (advertise & ADVERTISED_100baseT_Half)
adv |= ADVERTISE_100HALF;
if (advertise & ADVERTISED_100baseT_Full)
adv |= ADVERTISE_100FULL;
if (advertise & ADVERTISED_Pause)
adv |= ADVERTISE_PAUSE_CAP;
if (advertise & ADVERTISED_Asym_Pause)
adv |= ADVERTISE_PAUSE_ASYM;
err = phy_write(phydev, MII_ADVERTISE, adv);
if (err < 0)
return err;
/* Configure gigabit if it's supported */
if (phydev->supported & (SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full)) {
adv = phy_read(phydev, MII_CTRL1000);
if (adv < 0)
return adv;
adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
if (advertise & SUPPORTED_1000baseT_Half)
adv |= ADVERTISE_1000HALF;
if (advertise & SUPPORTED_1000baseT_Full)
adv |= ADVERTISE_1000FULL;
err = phy_write(phydev, MII_CTRL1000, adv);
if (err < 0)
return err;
}
return adv;
}
EXPORT_SYMBOL(genphy_config_advert);
/* genphy_setup_forced
*
* description: Configures MII_BMCR to force speed/duplex
* to the values in phydev. Assumes that the values are valid.
* Please see phy_sanitize_settings() */
int genphy_setup_forced(struct phy_device *phydev)
{
int ctl = BMCR_RESET;
phydev->pause = phydev->asym_pause = 0;
if (SPEED_1000 == phydev->speed)
ctl |= BMCR_SPEED1000;
else if (SPEED_100 == phydev->speed)
ctl |= BMCR_SPEED100;
if (DUPLEX_FULL == phydev->duplex)
ctl |= BMCR_FULLDPLX;
ctl = phy_write(phydev, MII_BMCR, ctl);
if (ctl < 0)
return ctl;
/* We just reset the device, so we'd better configure any
* settings the PHY requires to operate */
if (phydev->drv->config_init)
ctl = phydev->drv->config_init(phydev);
return ctl;
}
/* Enable and Restart Autonegotiation */
int genphy_restart_aneg(struct phy_device *phydev)
{
int ctl;
ctl = phy_read(phydev, MII_BMCR);
if (ctl < 0)
return ctl;
ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
/* Don't isolate the PHY if we're negotiating */
ctl &= ~(BMCR_ISOLATE);
ctl = phy_write(phydev, MII_BMCR, ctl);
return ctl;
}
/* genphy_config_aneg
*
* description: If auto-negotiation is enabled, we configure the
* advertising, and then restart auto-negotiation. If it is not
* enabled, then we write the BMCR
*/
int genphy_config_aneg(struct phy_device *phydev)
{
int err = 0;
if (AUTONEG_ENABLE == phydev->autoneg) {
err = genphy_config_advert(phydev);
if (err < 0)
return err;
err = genphy_restart_aneg(phydev);
} else
err = genphy_setup_forced(phydev);
return err;
}
EXPORT_SYMBOL(genphy_config_aneg);
/* genphy_update_link
*
* description: Update the value in phydev->link to reflect the
* current link value. In order to do this, we need to read
* the status register twice, keeping the second value
*/
int genphy_update_link(struct phy_device *phydev)
{
int status;
/* Do a fake read */
status = phy_read(phydev, MII_BMSR);
if (status < 0)
return status;
/* Read link and autonegotiation status */
status = phy_read(phydev, MII_BMSR);
if (status < 0)
return status;
if ((status & BMSR_LSTATUS) == 0)
phydev->link = 0;
else
phydev->link = 1;
return 0;
}
/* genphy_read_status
*
* description: Check the link, then figure out the current state
* by comparing what we advertise with what the link partner
* advertises. Start by checking the gigabit possibilities,
* then move on to 10/100.
*/
int genphy_read_status(struct phy_device *phydev)
{
int adv;
int err;
int lpa;
int lpagb = 0;
/* Update the link, but return if there
* was an error */
err = genphy_update_link(phydev);
if (err)
return err;
if (AUTONEG_ENABLE == phydev->autoneg) {
if (phydev->supported & (SUPPORTED_1000baseT_Half
| SUPPORTED_1000baseT_Full)) {
lpagb = phy_read(phydev, MII_STAT1000);
if (lpagb < 0)
return lpagb;
adv = phy_read(phydev, MII_CTRL1000);
if (adv < 0)
return adv;
lpagb &= adv << 2;
}
lpa = phy_read(phydev, MII_LPA);
if (lpa < 0)
return lpa;
adv = phy_read(phydev, MII_ADVERTISE);
if (adv < 0)
return adv;
lpa &= adv;
phydev->speed = SPEED_10;
phydev->duplex = DUPLEX_HALF;
phydev->pause = phydev->asym_pause = 0;
if (lpagb & (LPA_1000FULL | LPA_1000HALF)) {
phydev->speed = SPEED_1000;
if (lpagb & LPA_1000FULL)
phydev->duplex = DUPLEX_FULL;
} else if (lpa & (LPA_100FULL | LPA_100HALF)) {
phydev->speed = SPEED_100;
if (lpa & LPA_100FULL)
phydev->duplex = DUPLEX_FULL;
} else
if (lpa & LPA_10FULL)
phydev->duplex = DUPLEX_FULL;
if (phydev->duplex == DUPLEX_FULL){
phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
}
} else {
int bmcr = phy_read(phydev, MII_BMCR);
if (bmcr < 0)
return bmcr;
if (bmcr & BMCR_FULLDPLX)
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
if (bmcr & BMCR_SPEED1000)
phydev->speed = SPEED_1000;
else if (bmcr & BMCR_SPEED100)
phydev->speed = SPEED_100;
else
phydev->speed = SPEED_10;
phydev->pause = phydev->asym_pause = 0;
}
return 0;
}
EXPORT_SYMBOL(genphy_read_status);
static int genphy_config_init(struct phy_device *phydev)
{
u32 val;
u32 features;
/* For now, I'll claim that the generic driver supports
* all possible port types */
features = (SUPPORTED_TP | SUPPORTED_MII
| SUPPORTED_AUI | SUPPORTED_FIBRE |
SUPPORTED_BNC);
/* Do we support autonegotiation? */
val = phy_read(phydev, MII_BMSR);
if (val < 0)
return val;
if (val & BMSR_ANEGCAPABLE)
features |= SUPPORTED_Autoneg;
if (val & BMSR_100FULL)
features |= SUPPORTED_100baseT_Full;
if (val & BMSR_100HALF)
features |= SUPPORTED_100baseT_Half;
if (val & BMSR_10FULL)
features |= SUPPORTED_10baseT_Full;
if (val & BMSR_10HALF)
features |= SUPPORTED_10baseT_Half;
if (val & BMSR_ESTATEN) {
val = phy_read(phydev, MII_ESTATUS);
if (val < 0)
return val;
if (val & ESTATUS_1000_TFULL)
features |= SUPPORTED_1000baseT_Full;
if (val & ESTATUS_1000_THALF)
features |= SUPPORTED_1000baseT_Half;
}
phydev->supported = features;
phydev->advertising = features;
return 0;
}
/* phy_probe
*
* description: Take care of setting up the phy_device structure,
* set the state to READY (the driver's init function should
* set it to STARTING if needed).
*/
static int phy_probe(struct device *dev)
{
struct phy_device *phydev;
struct phy_driver *phydrv;
struct device_driver *drv;
int err = 0;
phydev = to_phy_device(dev);
/* Make sure the driver is held.
* XXX -- Is this correct? */
drv = get_driver(phydev->dev.driver);
phydrv = to_phy_driver(drv);
phydev->drv = phydrv;
/* Disable the interrupt if the PHY doesn't support it */
if (!(phydrv->flags & PHY_HAS_INTERRUPT))
phydev->irq = PHY_POLL;
spin_lock(&phydev->lock);
/* Start out supporting everything. Eventually,
* a controller will attach, and may modify one
* or both of these values */
phydev->supported = phydrv->features;
phydev->advertising = phydrv->features;
/* Set the state to READY by default */
phydev->state = PHY_READY;
if (phydev->drv->probe)
err = phydev->drv->probe(phydev);
spin_unlock(&phydev->lock);
if (err < 0)
return err;
if (phydev->drv->config_init)
err = phydev->drv->config_init(phydev);
return err;
}
static int phy_remove(struct device *dev)
{
struct phy_device *phydev;
phydev = to_phy_device(dev);
spin_lock(&phydev->lock);
phydev->state = PHY_DOWN;
spin_unlock(&phydev->lock);
if (phydev->drv->remove)
phydev->drv->remove(phydev);
put_driver(dev->driver);
phydev->drv = NULL;
return 0;
}
int phy_driver_register(struct phy_driver *new_driver)
{
int retval;
memset(&new_driver->driver, 0, sizeof(new_driver->driver));
new_driver->driver.name = new_driver->name;
new_driver->driver.bus = &mdio_bus_type;
new_driver->driver.probe = phy_probe;
new_driver->driver.remove = phy_remove;
retval = driver_register(&new_driver->driver);
if (retval) {
printk(KERN_ERR "%s: Error %d in registering driver\n",
new_driver->name, retval);
return retval;
}
pr_info("%s: Registered new driver\n", new_driver->name);
return 0;
}
EXPORT_SYMBOL(phy_driver_register);
void phy_driver_unregister(struct phy_driver *drv)
{
driver_unregister(&drv->driver);
}
EXPORT_SYMBOL(phy_driver_unregister);
static struct phy_driver genphy_driver = {
.phy_id = 0xffffffff,
.phy_id_mask = 0xffffffff,
.name = "Generic PHY",
.config_init = genphy_config_init,
.features = 0,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.driver = {.owner = THIS_MODULE, },
};
static int __init genphy_init(void)
{
return phy_driver_register(&genphy_driver);
}
static void __exit genphy_exit(void)
{
phy_driver_unregister(&genphy_driver);
}
module_init(genphy_init);
module_exit(genphy_exit);

143
drivers/net/phy/qsemi.c Normal file
View file

@ -0,0 +1,143 @@
/*
* drivers/net/phy/qsemi.c
*
* Driver for Quality Semiconductor PHYs
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
/* ------------------------------------------------------------------------- */
/* The Quality Semiconductor QS6612 is used on the RPX CLLF */
/* register definitions */
#define MII_QS6612_MCR 17 /* Mode Control Register */
#define MII_QS6612_FTR 27 /* Factory Test Register */
#define MII_QS6612_MCO 28 /* Misc. Control Register */
#define MII_QS6612_ISR 29 /* Interrupt Source Register */
#define MII_QS6612_IMR 30 /* Interrupt Mask Register */
#define MII_QS6612_IMR_INIT 0x003a
#define MII_QS6612_PCR 31 /* 100BaseTx PHY Control Reg. */
#define QS6612_PCR_AN_COMPLETE 0x1000
#define QS6612_PCR_RLBEN 0x0200
#define QS6612_PCR_DCREN 0x0100
#define QS6612_PCR_4B5BEN 0x0040
#define QS6612_PCR_TX_ISOLATE 0x0020
#define QS6612_PCR_MLT3_DIS 0x0002
#define QS6612_PCR_SCRM_DESCRM 0x0001
MODULE_DESCRIPTION("Quality Semiconductor PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");
/* Returns 0, unless there's a write error */
static int qs6612_config_init(struct phy_device *phydev)
{
/* The PHY powers up isolated on the RPX,
* so send a command to allow operation.
* XXX - My docs indicate this should be 0x0940
* ...or something. The current value sets three
* reserved bits, bit 11, which specifies it should be
* set to one, bit 10, which specifies it should be set
* to 0, and bit 7, which doesn't specify. However, my
* docs are preliminary, and I will leave it like this
* until someone more knowledgable corrects me or it.
* -- Andy Fleming
*/
return phy_write(phydev, MII_QS6612_PCR, 0x0dc0);
}
static int qs6612_ack_interrupt(struct phy_device *phydev)
{
int err;
err = phy_read(phydev, MII_QS6612_ISR);
if (err < 0)
return err;
err = phy_read(phydev, MII_BMSR);
if (err < 0)
return err;
err = phy_read(phydev, MII_EXPANSION);
if (err < 0)
return err;
return 0;
}
static int qs6612_config_intr(struct phy_device *phydev)
{
int err;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
err = phy_write(phydev, MII_QS6612_IMR,
MII_QS6612_IMR_INIT);
else
err = phy_write(phydev, MII_QS6612_IMR, 0);
return err;
}
static struct phy_driver qs6612_driver = {
.phy_id = 0x00181440,
.name = "QS6612",
.phy_id_mask = 0xfffffff0,
.features = PHY_BASIC_FEATURES,
.flags = PHY_HAS_INTERRUPT,
.config_init = qs6612_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = qs6612_ack_interrupt,
.config_intr = qs6612_config_intr,
.driver = { .owner = THIS_MODULE,},
};
static int __init qs6612_init(void)
{
return phy_driver_register(&qs6612_driver);
}
static void __exit qs6612_exit(void)
{
phy_driver_unregister(&qs6612_driver);
}
module_init(qs6612_init);
module_exit(qs6612_exit);

4
include/linux/ethtool.h
View file

@ -408,6 +408,8 @@ struct ethtool_ops {
#define SUPPORTED_FIBRE (1 << 10)
#define SUPPORTED_BNC (1 << 11)
#define SUPPORTED_10000baseT_Full (1 << 12)
#define SUPPORTED_Pause (1 << 13)
#define SUPPORTED_Asym_Pause (1 << 14)
/* Indicates what features are advertised by the interface. */
#define ADVERTISED_10baseT_Half (1 << 0)
@ -423,6 +425,8 @@ struct ethtool_ops {
#define ADVERTISED_FIBRE (1 << 10)
#define ADVERTISED_BNC (1 << 11)
#define ADVERTISED_10000baseT_Full (1 << 12)
#define ADVERTISED_Pause (1 << 13)
#define ADVERTISED_Asym_Pause (1 << 14)
/* The following are all involved in forcing a particular link
* mode for the device for setting things. When getting the

9
include/linux/mii.h
View file

@ -22,6 +22,7 @@
#define MII_EXPANSION 0x06 /* Expansion register */
#define MII_CTRL1000 0x09 /* 1000BASE-T control */
#define MII_STAT1000 0x0a /* 1000BASE-T status */
#define MII_ESTATUS 0x0f /* Extended Status */
#define MII_DCOUNTER 0x12 /* Disconnect counter */
#define MII_FCSCOUNTER 0x13 /* False carrier counter */
#define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
@ -54,7 +55,10 @@
#define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
#define BMSR_RFAULT 0x0010 /* Remote fault detected */
#define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
#define BMSR_RESV 0x07c0 /* Unused... */
#define BMSR_RESV 0x00c0 /* Unused... */
#define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
#define BMSR_100FULL2 0x0200 /* Can do 100BASE-T2 HDX */
#define BMSR_100HALF2 0x0400 /* Can do 100BASE-T2 FDX */
#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
@ -114,6 +118,9 @@
#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
#define EXPANSION_RESV 0xffe0 /* Unused... */
#define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
#define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */
/* N-way test register. */
#define NWAYTEST_RESV1 0x00ff /* Unused... */
#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */

378
include/linux/phy.h Normal file
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@ -0,0 +1,378 @@
/*
* include/linux/phy.h
*
* Framework and drivers for configuring and reading different PHYs
* Based on code in sungem_phy.c and gianfar_phy.c
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#ifndef __PHY_H
#define __PHY_H
#include <linux/spinlock.h>
#include <linux/device.h>
#define PHY_BASIC_FEATURES (SUPPORTED_10baseT_Half | \
SUPPORTED_10baseT_Full | \
SUPPORTED_100baseT_Half | \
SUPPORTED_100baseT_Full | \
SUPPORTED_Autoneg | \
SUPPORTED_TP | \
SUPPORTED_MII)
#define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \
SUPPORTED_1000baseT_Half | \
SUPPORTED_1000baseT_Full)
/* Set phydev->irq to PHY_POLL if interrupts are not supported,
* or not desired for this PHY. Set to PHY_IGNORE_INTERRUPT if
* the attached driver handles the interrupt
*/
#define PHY_POLL -1
#define PHY_IGNORE_INTERRUPT -2
#define PHY_HAS_INTERRUPT 0x00000001
#define PHY_HAS_MAGICANEG 0x00000002
#define MII_BUS_MAX 4
#define PHY_INIT_TIMEOUT 100000
#define PHY_STATE_TIME 1
#define PHY_FORCE_TIMEOUT 10
#define PHY_AN_TIMEOUT 10
#define PHY_MAX_ADDR 32
/* The Bus class for PHYs. Devices which provide access to
* PHYs should register using this structure */
struct mii_bus {
const char *name;
int id;
void *priv;
int (*read)(struct mii_bus *bus, int phy_id, int regnum);
int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val);
int (*reset)(struct mii_bus *bus);
/* A lock to ensure that only one thing can read/write
* the MDIO bus at a time */
spinlock_t mdio_lock;
struct device *dev;
/* list of all PHYs on bus */
struct phy_device *phy_map[PHY_MAX_ADDR];
/* Pointer to an array of interrupts, each PHY's
* interrupt at the index matching its address */
int *irq;
};
#define PHY_INTERRUPT_DISABLED 0x0
#define PHY_INTERRUPT_ENABLED 0x80000000
/* PHY state machine states:
*
* DOWN: PHY device and driver are not ready for anything. probe
* should be called if and only if the PHY is in this state,
* given that the PHY device exists.
* - PHY driver probe function will, depending on the PHY, set
* the state to STARTING or READY
*
* STARTING: PHY device is coming up, and the ethernet driver is
* not ready. PHY drivers may set this in the probe function.
* If they do, they are responsible for making sure the state is
* eventually set to indicate whether the PHY is UP or READY,
* depending on the state when the PHY is done starting up.
* - PHY driver will set the state to READY
* - start will set the state to PENDING
*
* READY: PHY is ready to send and receive packets, but the
* controller is not. By default, PHYs which do not implement
* probe will be set to this state by phy_probe(). If the PHY
* driver knows the PHY is ready, and the PHY state is STARTING,
* then it sets this STATE.
* - start will set the state to UP
*
* PENDING: PHY device is coming up, but the ethernet driver is
* ready. phy_start will set this state if the PHY state is
* STARTING.
* - PHY driver will set the state to UP when the PHY is ready
*
* UP: The PHY and attached device are ready to do work.
* Interrupts should be started here.
* - timer moves to AN
*
* AN: The PHY is currently negotiating the link state. Link is
* therefore down for now. phy_timer will set this state when it
* detects the state is UP. config_aneg will set this state
* whenever called with phydev->autoneg set to AUTONEG_ENABLE.
* - If autonegotiation finishes, but there's no link, it sets
* the state to NOLINK.
* - If aneg finishes with link, it sets the state to RUNNING,
* and calls adjust_link
* - If autonegotiation did not finish after an arbitrary amount
* of time, autonegotiation should be tried again if the PHY
* supports "magic" autonegotiation (back to AN)
* - If it didn't finish, and no magic_aneg, move to FORCING.
*
* NOLINK: PHY is up, but not currently plugged in.
* - If the timer notes that the link comes back, we move to RUNNING
* - config_aneg moves to AN
* - phy_stop moves to HALTED
*
* FORCING: PHY is being configured with forced settings
* - if link is up, move to RUNNING
* - If link is down, we drop to the next highest setting, and
* retry (FORCING) after a timeout
* - phy_stop moves to HALTED
*
* RUNNING: PHY is currently up, running, and possibly sending
* and/or receiving packets
* - timer will set CHANGELINK if we're polling (this ensures the
* link state is polled every other cycle of this state machine,
* which makes it every other second)
* - irq will set CHANGELINK
* - config_aneg will set AN
* - phy_stop moves to HALTED
*
* CHANGELINK: PHY experienced a change in link state
* - timer moves to RUNNING if link
* - timer moves to NOLINK if the link is down
* - phy_stop moves to HALTED
*
* HALTED: PHY is up, but no polling or interrupts are done. Or
* PHY is in an error state.
*
* - phy_start moves to RESUMING
*
* RESUMING: PHY was halted, but now wants to run again.
* - If we are forcing, or aneg is done, timer moves to RUNNING
* - If aneg is not done, timer moves to AN
* - phy_stop moves to HALTED
*/
enum phy_state {
PHY_DOWN=0,
PHY_STARTING,
PHY_READY,
PHY_PENDING,
PHY_UP,
PHY_AN,
PHY_RUNNING,
PHY_NOLINK,
PHY_FORCING,
PHY_CHANGELINK,
PHY_HALTED,
PHY_RESUMING
};
/* phy_device: An instance of a PHY
*
* drv: Pointer to the driver for this PHY instance
* bus: Pointer to the bus this PHY is on
* dev: driver model device structure for this PHY
* phy_id: UID for this device found during discovery
* state: state of the PHY for management purposes
* dev_flags: Device-specific flags used by the PHY driver.
* addr: Bus address of PHY
* link_timeout: The number of timer firings to wait before the
* giving up on the current attempt at acquiring a link
* irq: IRQ number of the PHY's interrupt (-1 if none)
* phy_timer: The timer for handling the state machine
* phy_queue: A work_queue for the interrupt
* attached_dev: The attached enet driver's device instance ptr
* adjust_link: Callback for the enet controller to respond to
* changes in the link state.
* adjust_state: Callback for the enet driver to respond to
* changes in the state machine.
*
* speed, duplex, pause, supported, advertising, and
* autoneg are used like in mii_if_info
*
* interrupts currently only supports enabled or disabled,
* but could be changed in the future to support enabling
* and disabling specific interrupts
*
* Contains some infrastructure for polling and interrupt
* handling, as well as handling shifts in PHY hardware state
*/
struct phy_device {
/* Information about the PHY type */
/* And management functions */
struct phy_driver *drv;
struct mii_bus *bus;
struct device dev;
u32 phy_id;
enum phy_state state;
u32 dev_flags;
/* Bus address of the PHY (0-32) */
int addr;
/* forced speed & duplex (no autoneg)
* partner speed & duplex & pause (autoneg)
*/
int speed;
int duplex;
int pause;
int asym_pause;
/* The most recently read link state */
int link;
/* Enabled Interrupts */
u32 interrupts;
/* Union of PHY and Attached devices' supported modes */
/* See mii.h for more info */
u32 supported;
u32 advertising;
int autoneg;
int link_timeout;
/* Interrupt number for this PHY
* -1 means no interrupt */
int irq;
/* private data pointer */
/* For use by PHYs to maintain extra state */
void *priv;
/* Interrupt and Polling infrastructure */
struct work_struct phy_queue;
struct timer_list phy_timer;
spinlock_t lock;
struct net_device *attached_dev;
void (*adjust_link)(struct net_device *dev);
void (*adjust_state)(struct net_device *dev);
};
#define to_phy_device(d) container_of(d, struct phy_device, dev)
/* struct phy_driver: Driver structure for a particular PHY type
*
* phy_id: The result of reading the UID registers of this PHY
* type, and ANDing them with the phy_id_mask. This driver
* only works for PHYs with IDs which match this field
* name: The friendly name of this PHY type
* phy_id_mask: Defines the important bits of the phy_id
* features: A list of features (speed, duplex, etc) supported
* by this PHY
* flags: A bitfield defining certain other features this PHY
* supports (like interrupts)
*
* The drivers must implement config_aneg and read_status. All
* other functions are optional. Note that none of these
* functions should be called from interrupt time. The goal is
* for the bus read/write functions to be able to block when the
* bus transaction is happening, and be freed up by an interrupt
* (The MPC85xx has this ability, though it is not currently
* supported in the driver).
*/
struct phy_driver {
u32 phy_id;
char *name;
unsigned int phy_id_mask;
u32 features;
u32 flags;
/* Called to initialize the PHY,
* including after a reset */
int (*config_init)(struct phy_device *phydev);
/* Called during discovery. Used to set
* up device-specific structures, if any */
int (*probe)(struct phy_device *phydev);
/* PHY Power Management */
int (*suspend)(struct phy_device *phydev);
int (*resume)(struct phy_device *phydev);
/* Configures the advertisement and resets
* autonegotiation if phydev->autoneg is on,
* forces the speed to the current settings in phydev
* if phydev->autoneg is off */
int (*config_aneg)(struct phy_device *phydev);
/* Determines the negotiated speed and duplex */
int (*read_status)(struct phy_device *phydev);
/* Clears any pending interrupts */
int (*ack_interrupt)(struct phy_device *phydev);
/* Enables or disables interrupts */
int (*config_intr)(struct phy_device *phydev);
/* Clears up any memory if needed */
void (*remove)(struct phy_device *phydev);
struct device_driver driver;
};
#define to_phy_driver(d) container_of(d, struct phy_driver, driver)
int phy_read(struct phy_device *phydev, u16 regnum);
int phy_write(struct phy_device *phydev, u16 regnum, u16 val);
struct phy_device* get_phy_device(struct mii_bus *bus, int addr);
int phy_clear_interrupt(struct phy_device *phydev);
int phy_config_interrupt(struct phy_device *phydev, u32 interrupts);
struct phy_device * phy_attach(struct net_device *dev,
const char *phy_id, u32 flags);
struct phy_device * phy_connect(struct net_device *dev, const char *phy_id,
void (*handler)(struct net_device *), u32 flags);
void phy_disconnect(struct phy_device *phydev);
void phy_detach(struct phy_device *phydev);
void phy_start(struct phy_device *phydev);
void phy_stop(struct phy_device *phydev);
int phy_start_aneg(struct phy_device *phydev);
int mdiobus_register(struct mii_bus *bus);
void mdiobus_unregister(struct mii_bus *bus);
void phy_sanitize_settings(struct phy_device *phydev);
int phy_stop_interrupts(struct phy_device *phydev);
static inline int phy_read_status(struct phy_device *phydev) {
return phydev->drv->read_status(phydev);
}
int genphy_config_advert(struct phy_device *phydev);
int genphy_setup_forced(struct phy_device *phydev);
int genphy_restart_aneg(struct phy_device *phydev);
int genphy_config_aneg(struct phy_device *phydev);
int genphy_update_link(struct phy_device *phydev);
int genphy_read_status(struct phy_device *phydev);
void phy_driver_unregister(struct phy_driver *drv);
int phy_driver_register(struct phy_driver *new_driver);
void phy_prepare_link(struct phy_device *phydev,
void (*adjust_link)(struct net_device *));
void phy_start_machine(struct phy_device *phydev,
void (*handler)(struct net_device *));
void phy_stop_machine(struct phy_device *phydev);
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
int phy_mii_ioctl(struct phy_device *phydev,
struct mii_ioctl_data *mii_data, int cmd);
int phy_start_interrupts(struct phy_device *phydev);
void phy_print_status(struct phy_device *phydev);
extern struct bus_type mdio_bus_type;
extern struct phy_driver genphy_driver;
#endif /* __PHY_H */